Using SEFPRO lipstones will help you to optimize the quality of your glass and improve the productivity of your glass furnace. Glassmakers using SEFPRO lip stones optimize the quality of their glass and improve productivity.
The superior quality of SEFPRO lipstones has been achieved through the combined implementation of several technological breakthroughs:
Monolithic lip stones
SEFPRO manufactures its lip stones in one single piece, even to lengths of up to 2.8 meters. No joints mean perfectly uniform refractory/glass interface throughout the entire width of the glass sheet, eliminating one major source of glass defects.
Specially designed refractory quality
Since standard sillimanite such as Arkal 60 V does not provide sufficiently good characteristics in glass contact, SEFPRO has developed a new material to meet the demanding requirements for lip stones. SEFPRO introduces new Arkal 60 PR with all its advantages for improved glass.
Shorter “degassing” time
"Degassing" is when extremely fine bubbles are released from the lipstone when it is used for the first time. The time it takes for these bubbles to then disappear depends on the quality of the refractory. Arkal 60PR lip stones have a particularly short "degassing" time. They are operational in less than two hours after start-up.
Thermal shock resistance
Excellent thermal shock resistance means the lipstones can start up quickly. Commissioning lip stones requires no heating up and runs no risk of lip stones cracking.
Very low blistering
Very low blistering is a significant characteristic of Arkal 60PR and directly influences glass quality.
Strict technical specifications
Each SEFPRO lip stone has an identification number and is individually inspected for strict compliance with your specifications.
Given the long shape of lipstones, specially designed wooden crates have been prepared to package the lip stones for transport. Each lip stone is housed in carefully padded individual polystyrene protective wrapping.
Lipstones are tailor-made to each our clients' specific drawings. However, we do provide our clients with the possibility of maintaining minimum stock, as per the agreed upon sales conditions.